Question # 1

Which one is the property of an ideal solvent

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Should be expensive

It should react chemically with the solute

Impurities should crystallize along with the solute

Should be safe to use

Which has largest first ionization energy?

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Li

Na

K

Rb

Sodium thiosulfate is used in photography because of its

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Oxidizing behaviour

Reducing behaviour

Complexing behaviour

Photochemical behaviour

The number of oxygen atoms in 4.4 g of CO₂ is approximately

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1.2 x 10²³

6 x 10²²

6 x 10²³

12 x 10²³

Bragg's law is given by equation

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n λ = 2 θ sin θ

n λ = 2 d sin θ

2nλ = d sin θ

nλ = 1/2 d sin θ

Cannizzaro reaction is not given by

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Trimethyl acetaldehyde

Acetaldehyde

Benzaldehyde

Formaldehyde

Which is the most amphoteric?

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Na₂O

MgO

AI₂O₃

CaO

Setting of cement is an

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Exothermic reaction

Endothermic reaction

Neither exothermic nor endothermic

None

The heats evolved in combustion of rhombic and monoclinic sulphur are - 70960 and -71030 cal mol^-1 respectively what will be heat of conversion of rhombic sulphur ti monoclinic?

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70960 calories

71030 calories

-70 calories

+70 calories

Which of the following does not reflect the periodicity of elements?

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Bonding behaviour

Electronegativity

Ionisation potential

Neutron/proton ratio.

Among alkali metal salts,the lithium salts are the poorest conductors of electricity in aqueous solution because of

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Easy diffusion of Li⁺ ions

Lower ability of Li⁺ ions to polarize water molecules

Lowest charge to radius ratio

Higher degree of hydration of Li⁺ ions.

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